Sewing machine



FIG. 1 is a front view of the sewing machine of the new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof; and,

FIG. 7 is a front left top perspective view thereof.

All broken lines shown are shown for illustrative purposes only and form no part of the claimed design. 

CLAIM We claim the ornamental design for a sewing machine, as shown and described. 